Underworld Outfitters is a shop run by the ghoul, Tulip. It can be found on the east side of the ground floor of Underworld, and contains a variety of items.

Her store has a variety of armor and ammunition, and she also has a surprising amount of money (ranging from 400 to 600 caps), making her a great shop for mid level characters. Tulip generally sells a large amount of surplus army gear, having substantially more combat armor, 10mm pistols, and assault rifles than other shops. Tulip wakes up at 8:00am, but you can buy from her at any time.